I'm seriously considering a cutthroat for my next bike. It would be a bit more road and touring oriented than the usual cutthroat purposes.
I finally learned enough about modern BB shells to understand the basics (I've only dealt with threaded 68mm all these years), but I just can't seem to find who makes a double for the 41x91 shell that's on the cutthroat. It seems all the mainstream stuff is 1x11 now. I did find a couple that are obviously made for fat bikes. 24/34 and stuff like that.
Don't have a suggestion but perhaps look into the mtb? cranks with removable spider.
For example:- Easton has a range of 2x11 chainsets which go with their EC90 SL crankarms. However the old 'cinch' Race Face 2x10 spider (104/64 bcd, for example) works with this crank (10/11 speed rings), if you want to have lower gearing up front than the Easton range provides.
When I was looking at crank/gearing options for my 2x I came across a tech doc online for RaceFace cranks (e.g. Next SL) which suggested crank/spindle-length/bb options for different bottom bracket shells/widths.
Just take note of what kind of q-factor you'd like to have.
Don't have a suggestion but perhaps look into the mtb? cranks with removable spider.
For example:- Easton has a range of 2x11 chainsets which go with their EC90 SL crankarms. However the old 'cinch' Race Face 2x10 spider (104/64 bcd, for example) works with this crank (10/11 speed rings), if you want to have lower gearing up front than the Easton range provides.
When I was looking at crank/gearing options for my 2x (40/26) I came across a tech doc online for RaceFace cranks (e.g. Next SL) which suggested crank/spindle-length/bb options for different bottom bracket shells/widths.
Just take note of what kind of q-factor you'd like to have. I chose the Easton crank as it has a narrow q-factor, which the mtb-specific cranks couldn't match.
The Easton EC90 SL crank with 46/30 compact rings is a versatile setup. Can also put a RaceFace chain ring carrier on it to get lower gearing via 28/39, etc.
owly wrote:Just take note of what kind of q-factor you'd like to have. I chose the Easton crank as it has a narrow q-factor, which the mtb-specific cranks couldn't match.
The Cutthroat can't fit road cranks, it uses a wider MTB spec BB (and the chainring clearance is not there).
Sadly 42/28 is a pretty oldschool ratio. SRAM dumped 2x on MTBs and modern Shimano cranks have a 10T jump like 36/26, 34/24 etc. Don't forget that when choosing a front derailleur. They have an older 38/24 Deore FC-M615 which is still pretty available, but i'm not sure if they offer the BB you need.
What size and what kind of tyres are you planning to run?
I am using XTR 42/28 also (M980). You can find them on eBay and other sites pretty easily. Great crankset - but you do need to go 10 speed (XTR 10 speed is great stuff).
Thanks for all the info, everyone. It looks like I might have to figure something else out or forget about a cutthroat. I don't mind 10 speed at all, but I'll have to check out cassettes to see if I can get the gearing that I want. Maybe I'll just go totally old school and get a Black Mt. monster cross.
JWK1 wrote:Thanks for all the info, everyone. It looks like I might have to figure something else out or forget about a cutthroat. I don't mind 10 speed at all, but I'll have to check out cassettes to see if I can get the gearing that I want. Maybe I'll just go totally old school and get a Black Mt. monster cross.
You can use a 10sp crankset with an 11sp drivetrain, and vice versa, with no ill effects (all shimano spec of course, can't speak to other mfg's)
SpeedyChix wrote:The Easton EC90 SL crank with 46/30 compact rings is a versatile setup. Can also put a RaceFace chain ring carrier on it to get lower gearing via 28/39, etc.
Yes, but keep in mind the crankset only comes in 170 and 175 lengths (personally looking for smaller).
SRAM dumped 2x on MTBs and modern Shimano cranks have a 10T jump like 36/26, 34/24 etc. Don't forget that when choosing a front derailleur. They have an older 38/24 Deore FC-M615 which is still pretty available, but i'm not sure if they offer the BB you need.